Means for mounting gear-wheels.



PATENTED JULY 24, 1906.

L. KRIEGBR. MEANS FOR MOUNTING GEAR WHEELS.

APPLICATION FILED JAN.10. 1906.

In 5 I 4 I NUNUNNWK N 9 N 1 L 2 N 0" a Flgl .9 7 7 2 Z 5 L j there being no weak spot in either 0 UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Application filed January 10,1906. Serial No. 296,396.

Patented July 24, 1906;

To all whom it may concern:

Be it known that 1, Louis KRIEGER, engineer, of 45 Boulevard Haussmann, Paris, France,.have invented a new and useful Imrovement in Means for Mounting Gear- ?Vheels on the Ends of Shafts, which improvement is fully set forth in the followin specification.

This invention has f or its object when driving by means of a train of gearing to allow gear-wheels of very small diameter to be mounted upon shafts of a diameter sufficiently large .to resist strains.

When a gear-wheel is fitted upon its shaft in the ordinary manner it is necessary to provide a hole of a diameter such that the crown beneath the base of the teeth is too weak to support the strains, and the gear-wheel usually breaks at the cotter-pin b reason of its being the point of least strengt This invention consists in an arrangement of fitting a gear-wheel on a shaft by which this trouble is avoided. For this pur ose the gear-wheel is provided with a conica projection of small taper, which fits into a conical recess of the same angle formed in the extremity of the shaft. The two cones which are maintained in contact are keyed together by a bolt of small diameter which asses throu h the gear-wheel and screws mto a threaded hole tapped in the bottom of the re-- cess situated at the end of the shaft. The head of the bolt is provided with a suitable arrangement which. prevents it from unscrewing. Under these conditions the two parts (shaft and gear-wheel) work perfectly, them, as the groovein the shaft for thecotter-pin may be made in a proper thickness of metal.

In the case in which .the machine does not allow of the shaft being of a thickness sufficient to form a recess the portion in which the recess formed ma be thickened. This invention is particular y applicable to electric motors, and especially to motors adapted for the traction of vehicles.

The annexed drawings illustrate one method of carrying out this invention.

In the drawings, Figure 1 is a longitudinal section of a gear-wheel fitted without thickenin the shaft. Fig. 2 is a similar section, the s aft being thickened.

In the fi res the gear-wheel 1 is in one piece with 5i; conical recess 2, having a small taper which fits into a cone 3 of the same angle formed in the shaft4. The keying is effected by the cotter-pin 5.

Fi 2 shows the recess arranged in an extra t 'ckness of metal 6, provided at the end of the shaft 4 in the case in which the shaft in the inside of the machine is of a thickness insufficient to contain the cone.

' The gear-wheel is maintained in position by means of a bolt 7 of small diameterwhich passes through the gear wheel. and bein screw-threaded at 8 can screw into a thread ed hole tap ed at the end of the shaft in the bottom oft e conical recess 3. The arrangement shown in the drawings for preventing the bolt 7 from becoming unscrewed consists in a s lit elastic washer 9.

1. The combination with a gear-wheel having a projection extending therefrom, of a shfat provided with a recess adaptedto receive the projection, and means for securing the projection within the recessagainst rotary movement relative to the shaft.

2. The combination with a gear-wheel having a projection extending axially therefrom, of a shaft provided in its end with a recess adapted to receive the projection, and means for securing the projection within the recess against rotary movement relative to the shaft. Y

3. The combination with a gear-wheel having a projection extending axiall therefrom, of a shaft provided in its end with a recess adapted to receive the projection, means for preventing relative rotation of the shafttherefrom, of a shaft provided in its end wit a conical recess adapted to receive the projection, a cotter-pin to prevent relative rotation of the gear-wheel andshaft, and a bolt extending axially of the gear-wheel and threaded into the shaft to prevent their l0ngitudinal displacement.

6. The combination with a gear-wheel having a conical projection extending axially too therefrom, of a shaft enlarged at its end and In testimony whereof I have signed this having provided therein a conical recess specification in the presence of two subscribada ted to receive the rejection, a bolt exl ing witnesses. ten ingaxially throw the gear-wheel and LOUIS KRIEGER.

5 threaded into. the she? at the. bottom of the Witnesses:

recess to exert tension to draw the gear- HANSON (100x12, awheel projectioninto the recess. GASTON DE MESTRAL. 

